Claude Opus 4.8 specs, prices, where it runs and its benchmark standing

Name: Claude Opus 4.8
Author: Anthropic

closed weights · #33 overall, podium score 2.9 · top 10 on 1 of 10 · released May 28, 2026

Provider: Anthropic
Release date: May 28, 2026; Boards
Parameters: Not disclosed by Anthropic
Modalities: Text, Image, Files to Text; OpenRouter
License: Proprietary; LMArena
Context window: 1M tokens; Pricing
Pricing: $5 in / $25 out per 1M tokens; All prices
Hosting: 11 priced API routes · AWS Bedrock (35 regions) · OpenRouter; Pricing Regions
Weights: Closed weights
Benchmarks: 10 boards captured, #33 overall

Rank	Board	Category	Score	Of
7	Document ArenaVision · as “Claude Opus 4.8 (High)”	Vision	1,486	40
12	MCP AtlasAgents and tools · as “claude-opus-4-8 (max)”	Agents and tools	82.2%	37
15	Vision ArenaVision · as “Claude Opus 4.8 (High)”	Vision	1,286	85
18	Epoch ECIReasoning · as “Claude Opus 4.8”	Reasoning	159.9	100
23	Search ArenaAgents and tools · as “Claude Opus 4.8”	Agents and tools	1,195	40
24	Text ArenaChat · as “Claude Opus 4.8 (High)”	Chat	1,482	84
24	ARC-AGI-2Reasoning · as “Claude Opus 4.8 (High)”	Reasoning	72.1%	92
29	LiveBenchReasoning · as “claude-opus-4-8-max-effort”	Reasoning	76.2%	64
32	GPQA DiamondReasoning · as “claude-opus-4-8_max”	Reasoning	91.0%	100
41	WebDev ArenaCoding · as “Claude Opus 4.8 (High)”	Coding	1,556	82

Versions and release history

9 versions in this line since May 14, 2025, from Pricing, OpenRouter and the boards.

Category ranks, more models and catalog changes